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León-Palmero, Elizabeth; Morales-Baquero, Rafael; Reche, Isabel (2020): Dissolved concentrations of CH4, nutrients, and biological parameters in the water column of twelve Mediterranean reservoirs in Southern Spain [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.912535

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Abstract:
We sampled twice 12 reservoirs between July 2016 and August 2017 in southern Spain during the summer stratification and the winter mixing. We determined reservoir area, perimeter, and capacity using the next open databases: Infraestructura de Datos Espaciales de Andalucía (IDEAndalucia; http://www.ideandalucia.es/portal/web/ideandalucia/), and the Ministerio para la Transición Ecológica (https://www.embalses.net/). The reservoir volume (m3) divided by its surface area (m2) will yield the mean depth (m). We also calculated the shoreline development ratio (DL) (Aronow, 1982) and the shallowness index (1/m) by dividing the shoreline development index (DL) by the mean depth (m). We performed the vertical geochemical profiles of the reservoirs using a Seabird 19plus CTD profiler and obtained the measurements of temperature and dissolved oxygen. We collected samples at different depths for dissolved CH4 analysis in air-tight Winkler bottles by duplicate, preserved with a solution of HgCl2 (final concentration 1mM) to inhibit biological activity and sealed with Apiezon® grease to prevent gas exchange. We measured dissolved CH4 using headspace equilibration and gas chromatography (2-3 replicates per bottle). We measured DIC, DOC, TN, and TDN by high–temperature catalytic oxidation using a Shimadzu total organic carbon analyzer (Model TOC-V CSH) coupled to nitrogen analyzer (TNM-1). We determined the NO3 concentration using the ultraviolet spectrophotometric method, using a Perkin Elmer UV-Lambda 40 spectrophotometer at wavelengths of 220 nm and correcting for DOC absorbance at 275 nm (APHA, 1992). We measured NH4 and NO2 concentrations by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). Dissolved inorganic nitrogen (DIN) is the addition of the NO3, NH4, and NO2 concentrations. We measured total phosphorus (TP) concentration by triplicate using the molybdenum blue method (Murphy and Riley, 1962) after digestion with a mixture of potassium persulphate and boric acid at 120 °C for 30 min (APHA, 1992). We determined chlorophyll-a concentration by extracting the pigments from filters with 95% methanol in the dark at 4 °C for 24 h (APHA, 1992). We measured chlorophyll-a (Chl-a) absorption using a Perkin Elmer UV-Lambda 40 spectrophotometer at the wavelength of 665 nm and for scattering correction at 750 nm. . To obtain the integrated mean of chlorophyll-a (μg Chl-a /l), from the discrete points along the water column, we used the trapezoidal rule (León-Palmero et al., 2019). To obtain the cumulative chlorophyll-a concentration in the whole water column (mg Chl-a/m2), we summed the concentration of chlorophyll-a from each stratum using the trapezoidal rule, as we did for the integrated chlorophyll-a before, but we omitted the division between the maximum depth. We determined the abundances of cyanobacteria and photosynthetic picoeukaryotes using flow cytometry (FACScalibur) using unfiltered water.
Keyword(s):
CH4; CO2; Greenhouse gases; N2O; reservoir
Supplement to:
León-Palmero, Elizabeth; Contreras-Ruiz, Alba; Sierra, Ana; Morales-Baquero, Rafael; Reche, Isabel (2020): Dissolved CH4; coupled to photosynthetic picoeukaryotes in oxic waters and to cumulative chlorophyll a in anoxic waters of reservoirs. Biogeosciences, 17(12), 3223-3245, https://doi.org/10.5194/bg-17-3223-2020
Related to:
León-Palmero, Elizabeth; Morales-Baquero, Rafael; Reche, Isabel (2020): Primary production of twelve Mediterranean reservoirs in Southern Spain. PANGAEA, https://doi.org/10.1594/PANGAEA.912555
Coverage:
Median Latitude: 37.519167 * Median Longitude: -3.432500 * South-bound Latitude: 36.860000 * West-bound Longitude: -4.330000 * North-bound Latitude: 38.400000 * East-bound Longitude: -2.650000
Date/Time Start: 2016-07-15T00:00:00 * Date/Time End: 2017-07-24T00:00:00
Minimum DEPTH, water: 0.000 m * Maximum DEPTH, water: 38.200 m
Event(s):
Bermejales (#5) * Latitude: 36.990000 * Longitude: -3.890000 * Method/Device: Multiple investigations (MULT)
Beznar (#8) * Latitude: 36.920000 * Longitude: -3.550000 * Method/Device: Multiple investigations (MULT)
Colomera (#2) * Latitude: 38.400000 * Longitude: -3.720000 * Method/Device: Multiple investigations (MULT)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventLeón-Palmero, Elizabeth
2DATE/TIMEDate/TimeLeón-Palmero, ElizabethGeocode – Sampling date
3PeriodPeriodLeón-Palmero, Elizabeth
4DEPTH, waterDepth watermLeón-Palmero, ElizabethGeocode
5MethaneCH4µmol/lLeón-Palmero, ElizabethHeadspace gas chromatographyDissolved
6Methane saturationMethane sat%León-Palmero, ElizabethHeadspace gas chromatography
7Year of establishmentEstablishmenta ADLeón-Palmero, ElizabethYear of construction
8Reservoir areaReservoir areakm2León-Palmero, ElizabethCalculated
9Shoreline development ratioDLLeón-Palmero, ElizabethCalculated
10DEPTH, waterDepth watermLeón-Palmero, ElizabethGeocode – Mean depth
11Shallowness indexShallowness1/mLeón-Palmero, ElizabethCalculated
12Reservoir capacityReservoir caphm3León-Palmero, ElizabethCalculated
13Reservoir volumeReservoir volhm3León-Palmero, ElizabethCalculatedDuring time of sampling
14Temperature, waterTemp°CLeón-Palmero, ElizabethCTD, Seabird 19plus
15OxygenO2µmol/lLeón-Palmero, ElizabethCTD, Seabird 19plus
16Oxygen saturationO2 sat%León-Palmero, ElizabethCTD, Seabird 19plus
17Chlorophyll aChl aµg/lLeón-Palmero, ElizabethSpectrophotometer Perkin-Elmer UV Lambda 40
18Chlorophyll a, areal concentrationChl a concmg/m2León-Palmero, Elizabeth
19Chlorophyll a, integratedChl a intµg/lLeón-Palmero, ElizabethCalculated
20Picoeukaryotes, photosyntheticPPEuk#/mlLeón-Palmero, ElizabethFACSCalibur flow-cytometer (Becton Dickinson)
21Picoeukaryotes, photosynthetic, standard deviationPPEuk std dev±León-Palmero, ElizabethFACSCalibur flow-cytometer (Becton Dickinson)
22Picoeukaryotes, photosyntheticPPEuk106 #/m2León-Palmero, ElizabethCalculatedCumulative
23Picoeukaryotes, photosynthetic, integratedPPEuk int#/mlLeón-Palmero, ElizabethCalculated
24CyanobacteriaCyanobact#/mlLeón-Palmero, ElizabethFACSCalibur flow-cytometer (Becton Dickinson)
25Cyanobacteria, standard deviationCyanobact std dev±León-Palmero, ElizabethFACSCalibur flow-cytometer (Becton Dickinson)
26CyanobacteriaCyanobact106 #/m2León-Palmero, ElizabethCalculatedCumulative
27Cyanobacteria, integratedCyanobact int#/mlLeón-Palmero, ElizabethCalculated
28ProkaryotesProkaryotes#/mlLeón-Palmero, Elizabeth
29Prokaryotes, standard deviationProk std dev±León-Palmero, ElizabethEpifluorescence microscopy
30Phosphorus, totalTPµmol/lLeón-Palmero, ElizabethMolybdenum blue method (Murphy & Riley, 1962)
31Phosphorus, total, standard deviationTP std dev±León-Palmero, Elizabeth
32Phosphorus, total dissolvedTDPµmol/lLeón-Palmero, ElizabethMolybdenum blue method (Murphy & Riley, 1962)
33Phosphorus, total dissolved, standard deviationTDP std dev±León-Palmero, Elizabeth
34Phosphorus, reactive solubleSRPµmol/lLeón-Palmero, ElizabethMolybdenum blue method (Murphy & Riley, 1962)
35Phosphorus, reactive soluble, standard deviationSRP std dev±León-Palmero, Elizabeth
36Carbon, organic, dissolvedDOCµmol/lLeón-Palmero, ElizabethShimadzu TOC-V CSH total organic carbon analyzer coupled to TNM-1 nitrogen analyzer
37Carbon, organic, dissolved, standard deviationDOC std dev±León-Palmero, Elizabeth
38Carbon, inorganic, dissolvedDICmmol/lLeón-Palmero, ElizabethCalculated
39Carbon, inorganic, dissolved, standard deviationDIC std dev±León-Palmero, Elizabeth
40Nitrogen, totalTNµmol/lLeón-Palmero, ElizabethShimadzu TOC-V CSH total organic carbon analyzer coupled to TNM-1 nitrogen analyzer
41Nitrogen, total, standard deviationTN std dev±León-Palmero, Elizabeth
42Nitrogen, total dissolvedTDNµmol/lLeón-Palmero, ElizabethShimadzu TOC-V CSH total organic carbon analyzer coupled to TNM-1 nitrogen analyzer
43Nitrogen, total dissolved, standard deviationTDN std dev±León-Palmero, Elizabeth
44Nitrate[NO3]-µmol/lLeón-Palmero, ElizabethSpectrophotometer Perkin-Elmer UV Lambda 40
45Nitrate, standard deviationNO3 std dev±León-Palmero, Elizabeth
46Nitrite[NO2]-µmol/lLeón-Palmero, ElizabethICP-OES, Inductively coupled plasma - optical emission spectrometry
47Nitrogen, inorganic, dissolvedDINµmol/lLeón-Palmero, ElizabethShimadzu TOC-V CSH total organic carbon analyzer coupled to TNM-1 nitrogen analyzerNitrate + nitrite, DIN
48Nitrogen, inorganic, dissolved/Carbon, organic, dissolved ratioDIN/DOCLeón-Palmero, Elizabeth
49Nitrogen, inorganic, dissolved/Phosphorus, total ratioDIN/TPLeón-Palmero, Elizabeth
Change history:
2020-04-29T09:38:10 – New datafile provided by author was uploaded
2020-12-14T09:14:51 – Data for mixing period of parameters Chlorophyll a (#19, rows 98:179 and #20 and 21, rows 104:109), Photosynthetic picoeukaryotes (#24 and 25, rows 104:109) and Cyanobacteria (#28 and 29, rows 104:109)
Size:
5848 data points

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